vacancies |  events | 

Net with Dyneema®



www.dsm.com

Dyneema®, produced by DSM Dyneema (a division of Royal DSM NV, the Netherlands), is a high performance poly-ethylene fiber with almost unlimited applications. The strength of Dyneema® results in a smaller twine diameter and therefore in lighter, stronger, and more efficient nets. 

Successful applications of Dyneema® in netting include trawl nets, aquaculture nets, and purse seine nets used in commercial fishing industry, safety nets used in the construction industry, as well as cargo nets used in the transport/logistic sector. The Dyneema® grades used for nets are typically SK62 and SK75.

High strength, low weight, small diameter

Netting made with Dyneema® is stronger and lighter than any other traditional material used for netting. Its strength allows the use of twines with a smaller diameter. Dyneema® used in a trawl net results in up to 50% thinner twines compared to polyamide of the same wet knot strength. This leads to significantly less drag in water. Considerable weight savings can be achieved for applications on land or in the air (e.g. cargo nets).

Durability

Nets made with Dyneema® do not absorb water and retain their knot strength, compared to knots in nylon netting which lose about 10% to 20% of their dry knot strength when submerged to water. With low elongation of approximately 5% (at breakage) and no shrinkage in water, the mesh size remains stable in normal use of the netting. Nets made with Dyneema® are highly resistant to cutting, tearing, abrasion and UV light, and are unaffected by moisture.

Net constructions

Dyneema® can be used in both single and double knotting and knotless constructions, such as Raschel and Ultracross® netting. The lifetime can be increased by coating the netting.

Aquaculture: providing a safer place to grow
When used in Raschel netting, the Dyneema® fiber for the same mesh breaking strength of nylon twines, results in only up to a third  of the weight. This makes them much easier and safer to lift in and out of the water. Nets made with Dyneema® are also extremely durable, have minimal elongation and are highly resistant to most chemicals including  salt and sea water. In addition, nets made with Dyneema® have thinner twines, which improves water flow through the cage and increases the net shape stability, all of which contributes to a healthier environment for the fish and a potentially more productive harvest. The lower weight reduces the annual anti-fouling treatment by about half.
Birds-Protection net Application

Another application of Dyneema© netting is the production of birds protection nets that are stronger than PE net of the same weight/sq.meter. or 3 times lighter in comparison to the equal tensile strength nets made of nylon and polyester.

Technical and commercial support

DSM expert application engineers and state-of-the-art Technicum laboratory are available to support our customers in identifying, developing or processing the best net application made with Dyneema®, based on your needs. In all applications, we work together with the net producers and end users to identify their benefits throughout the entire lifetime of the nets, taking all benefits into account.

CHEMICAL AND PHYSICAL CHARACTERISTICS OF SYNTHETIC FIBERS

 

FIBER

Chemical/physical characteristics

PA 6 HT

PA 66 HT

PES HT

PP

Dyneema SK75

PE

Tenacity (gr./den)

9

9

9

7

40

5

Elongation at break(%)

23

20

14

18

3,5

20

UV rays resistance

medium

weak

medium

medium

good

medium

Specific weight

1,14

1,14

1,38

0,91

0,97

0,97

Melting point C°

215-220

255-260

250-260

160-175

144-152

125-135

Resistance to alkalis

good

good

weak

good

good

good

Acid resistance

weak

weak

good

good

good

good

Moisture absorption%            (65%-20°C)

3,5-4,5

3,4-4,5

0,2-0,5

0

0

0

EMPIRICAL CRITERIA FOR IDENTIFICATION OF SYNTHETIC FIBERS

 

FIBER

Identification

PA

PES

PE

PP

Combustion

Fusion followed by a short-term flame with ejection of fused droplets

Fusion followed by slow combustion with bright yellow flame

Fusion followed by slow combustion with a dim blue flame

Fusion followed by slow combustion with a dim blue flame

Smoke

White

Nero with Soot

White

White

Odour

Celery

Hot oil

Blowing out candle

Hot wax

Residuals

Welding residuals grey/dark

Welding residuals hard and dark

Welding residuals soft

Welding residuals hard

ABBREVIATION

PA 6 HT

Polyamide (Nylon) 6 High tenacity

PA 6,6 HT

Polyamide (Nylon) 6,6 High tenacity

PES HT

Polyester  High tenacity

PP

Polypropylene

PE

Polyethylene

Specifications data of the different net types >>
Ask to us a quotation >>


Top>


Products

disclaimer |  photo credits |  privacy | 

Design by A.Ciattaglia
BADINOTTI 2011©, All Rights Reserved.